The impact of ICAM1 and VCAM1 gene polymorphisms on chronic allograft nephropathy and transplanted kidney function.

ICAM-1 and VCAM-1 adhesion molecules play important roles in the immune response and emergence of chronic allograft nephropathy (CAN). The several polymorphisms of ICAM1 and VCAM1 genes are associated with changes in molecular expression therefore affecting allograft function and immune responses after kidney transplantation. The aim of this study was to examine the impact of polymorphisms in ICAM1 and VCAM1 genes on biopsy-proven CAN and renal allograft function. The 270 Caucasian renal transplant recipients (166 men and 104 women) were genotyped for the rs5498 ICAM1 and rs1041163 and rs3170794 VCAM1 gene polymorphisms using real-time polymerase chain reaction. There was no correlation between polymorphisms and CAN. Creatinine concentrations in the first month after transplantation differed between the rs5498 ICAM1 genotypes (P = .095), being higher for GG carriers (AA + AG vs GG, P =.07) albeit not with statistical significance. Creatinine concentrations at 12, 24, and 36 months after transplantation differed significantly among rs5498 ICAM1 genotypes (P = .0046, P =.016, and P = .02) and were higher among GG carriers (AA + AG vs GG, P = .001, P = .004, and P = .006). Rs5498 ICAM1 GG genotype and receipient male gender were independent factors associated with higher creatinine concentrations. These results suggest that the rs5498 ICAM1 GG genotype may be associated with long-term allograft function.